I got this message everytime that i do refresh in the panel.
Welcome @italoestrada! Don’t be shy, just give us more information about the message: When and where does it appear? Can you provide a screenshot or even a screencast? Which installation? Does it appear right from the beginning or did you change something?
I did disable the soap module in my server, and did work. Its weird than having this module for some reason affect kirby panel.